Feeding mechanism



March 22 1927. 1,621,662

E. G: GARTIN FEEDING MECHANISM Filed June 2. 1921 Patented Mar. 22,1927.

ELMER Gr. GARTIN, OF CLAREIVIONT, NEW HAMP$HIRE ASSIGNOR T SULLIVAN MA-CHINERY COMPANY, A OOBJEOBATION OF MASSAGHU'iEETTS.

FEEDING MECHANISM.

Application filed June 2, 1921. Serial 1'10. 474,406.

My invention relates to feeding mechanisms and more particularly tofeeding mechanism for rock drills of the type known as stopers.

An object of my invention is to provide an improved feeding mechanism.Another object of my invention is to provide an improved feedingmechanism for rock drills. A further object of my invention is toprovide an improved feeding mechanisn'i for rock drills of the generaltype known as stopers whereby greater length of feed may be obtained andwhereby the initial point at which the entire normal feeding capacity ofthe feeding mechanism brought into effect may be varied. Other objectsof my invention will appear in the course of the following specificationand the appended claims.

In the accompanying drawings, I have shown for purposes of illustration,one form which my invention may assume in practice.

In these drawings, 7

Fig. 1 is a plan view of a stoper provided with my improved feedingmechanism.

Fig. 2 is a view in longitudinal central section on the line 2'2 of Fig.1 and on an enlarged scale.

Fig. 3 is a transverse section on the line 3-3 of Fig. 2.

For purposes of illustration I have shown my improved extensible feedingmechanism in use with a stoping drill which comprises a pressure fluidoperated motor 1 provided with a control valve 2 and adapted to operateupon a drill steel 3. i

The motor 1 is provided with a rod 4 by which it is, in the presentinstance, connected with my improved feeding mechanism. The rod 4 ismade hollow as indicated at 5 and is connected by way of a fluidconducting passage 6 with a valve 2 which controls the feed in a wellknown manner. Adjustably mounted on the rod 4 is cylinder 7 providedwith a bore 8 in which a piston 9 is disposed, the cylinder beingmovable relative to the piston under the action of pressure fluidsupplied to the cylinder bore 8. The piston 9 comprises a head which isprovided with a rearwardly extending piston rod or stem 10 upon which isarranged at its rear extremity a point 11 adapted to engage a wall ofthe stope, or timbering of any kind, and to serve as a fixed pointrelative to -which the drill as a whole may move when fed toward thework. The piston rod 10 is made hollow and of a suitable size totelescope over the rod 4 and a series of channels 12 are cut into itsinner peripheryto permit the free supply of fluid around the exterior ofthe rod 4 to the front end of the cylinder 7. A cross bar 13 is rigidlysecured to the rear end of the piston rod 10 and is connected by meansof side rods 14 with a. sliding clamp 15 which surroundsthe exterior ofthe cylinder 7 and controls the feed of the cylinder relative to thepiston.

For the purpose of controlling the rel ativ position of the cylinder 7with respect to the rod 4, I provide a clamp mechanism 17 by partiallysplitting a collar formed inte al with the front end of the cylinder72l1l placing within the groove 18 within the collar a band of frictionmaterial 19 which is adapted to be compressed about the rod 4 by meanscomprising a bolt 20 and a ban dled nut 21. A spring controlled stop 22is provided to prevent the accidentalwithdrawal ofthe rod 4 from thecylinder 7.

From the foregoing; description. the mode of operation of my improvedfeeding mechanism will be readily apparent. When it is desired. after drlling to the maximum distance permitted by the travel of the cylinder 7relative to the piston 9. it will be possible by shutting off the airsupply tothe cylinder and venting- .he latter by connectingthe supplyport 6 with circumferential groove 6 and a vent port '7 respectivelformed in the throttle valve and the valve casing to move the cylinder 7rearward on the piston 9. and by moving the cylinder 7 as a wholebackward along the rod 4 and again fixing it relative thereto tocontinue the feed for a fur-' ther distance. This mechanism is ofparticular utility in cases where the changes of steel are not uniform.For example; if a hole of a depth of twenty inches has been drilledaudit the travelof the cylinder 7 relative to the piston 9 is twentyinches, if the front of the drill is still six inches from the face ofthe rock after the cylinder has traveled the full twenty inches, it willbe obvious that this steel could not be completely used unless someother means than the piston 9' and cylinder 7 were provided.-

Vi ith my improved construction, however, at the end of the feed-whichis possible by means of cylinder and piston, that is, twenty inch feedin, the case assumed the drill runner merely cuts olf'his ainsupplytothe feed cylinder and releasing the clamp 17, forces backwardthe,entirefeed cylinder 7 adietance of 6inches and 'then reclamps it to therod 4. The rearward motion of the cylinder 7 has placed the piston 9 sixinchesgforward in the cylinder and the cylinder 7 then has a distance ofsix inches available for forward feed before the rear end of thecylinder again comes in contact with the piston- 9. This willpermit'th-e runningin ofthe hole to t he full available 'lengthof thesteel and accordingly will not rendernecessary the sacrificing of aportion of the possible drilling-that could be accomplished with anygiven steel. This is but one example ofthe way in which this mechanismmight prove useful and other ways will readily suggestthemselves-to oneskilled in the: art. It will also-be evident thatif the drilling is nottoo hard the mere release of the'clainp 17 will extend thefeed by reasonof the air acting on an areavequal tothe area of a circle having-thesame diameter as'the rod 4 and forcing the motor 1 androd 4 forward.

While l me in this application specifically described one form which myinvention may assumein practice, it will be understood that this form ofthe same is shown for purposes of illustration and-that the invention.may bejinodi-fied and embodied in other forms without departing-from itsspirit or the scope of the ap pended claims.

lVhatI claim as'new and desireto secure by Letters Patent is:

1. In a drilling apparatus, a drilling tool, and feeding means therefgrcomprising an extension member secured to and movable with said tool, anormally stationarycylindrical hollow member, member disposed about saidcylindrical hollow men iber and connectible in various positions to saidfirst mentioned member, and means for effecting relative movementbetween said cylindrical hollow member and said-third mentioned member.i

2. In a drilling apparatus, adrilling tool,

' and feeding meansT-therefor comprising a member secured to and movablewith said tool, anormally stationarycylindrical hollow member, a memberdisposed about said cylindrical hollow member and connectible to saidfirst mentioned member, said last mentioned member being zmovablerelative to said first mentioned member and said hollowmember, meansforfeifecting relative movement between said hollow member and saidthirdmentioned member, and means operable to retard the movement of saidfirst mentioned member .relative to said third mentioned member.

3. In a drilling apparatus, adrilling tool, and feeding meanslthereforcomprising a member secured to and movable with said tool, a normally.stationary cylindrical hollowmember relative towhich said firstmentioned member is movable, a member disposed about said cylindricalhollowanember and connectible' to said first mentioned member, said lastmentioned member being movable relative to said hollow member, means foreffecting relative movement between said members, and manuallycontrollable means to permit said movements to occur simultaneously orseparately.

l. In a drilling apparatus. a drilling tool, and-feeding means thereforcomprising an extension rod secured to and movablewith said tool, a feedcylinder adjustable longitudinally of said rod and connectiblethereto, anormally stationaryfeed piston contained in said cylinder, and meansforsupplying fluid to'said cylinder to effect movement of thelatterrelative tosaid piston.

55. In a drilling apparatus a drilling tool, and feeding means thereforcomprising an extension rod secured-to and movablewith saidtool acylinder operatively connected to said rod, a normallystationary"feeding pistoncontained in said cylinder and telescopically arrangedwith respectto said rod, and means for supplying tiuid to said cylinderto effect movement of the latter relative to said piston.

In a drilling apparatus, a drilling tool, and feeding means thereforcomprising an extension rod secured toand movable with said tool, acylinder member. a normal-lystationary piston member contained in saidcylinderand having a piston rod securedthereto. said cylinder andpistonbeing telescopically arranged with respect to saidgfirst-nientionedrod,means for securing one ofsaid members in a plurality of differentadjusted positions with respect to said rogl, a-nd means for supplyingpressure fluid to said cylinder memberto effect movement ofthe-latterrel ative to said piston member.

*7. :In a drilling apparatus, a drilling tool and feeding means thereforcompris ing an extension member secured toand moyable with said tool, afeed cylinder, means for connecting said cylinder in a plurality of ill)different longitudinally adjusted positions with respect to said member,a normally stationary piston contained in said cylinder and providedwith an abutment engaging element, and means for supplying pressurefluid to said cylinder member to effect movement of the latter relativeto said piston.

.8. In a drilling apparatus, a drillingtool, and feeding means thereforcomprising an extension rod secured to and movable with said tool, acylinder, means for securing said cylinder to said rod in a plurality oflongitudinally adjusted positions a normally stationary piston containedin said cylinder and provided with an abutment engaging element, andmeans for supplying pressure fluid to said cylinder to effect movementof the latter relative to said piston.

9. In a drilling apparatus, a drilling tool, and feeding means thereforcomprising an extension rod secured to and movable with said tool, acylinder within which said rod extends, the position of said cylinderbeing adjustable relative to said rod, a normally stationary pistoncontained in said cylinder adapted to telescope with said rod andprovided with an abutment engaging element, and means for supplyingpressure fluid to said cylinder to effect movement of the lat terrelative to said piston.

10. In a drilling apparatus, a drilling tool, and feeding means thereforcomprising an extension rod secured to and movable with said tool, acylinder within which said rod extends, the position of said cylinderbeing adjustable relative to said rod, a normally stationary pistoncontained in said cylinder adapted to telescope with said rod andprovided with an abutment engaging element, means between the exteriorof said rod and said piston for connecting the interior of the latterwith the cylinder ata point in front of the piston, and means forsupplying pressure fluid to said cylinder to effect movement of thelatter relative to said piston.

11. In a drilling apparatus, a drilling tool, and feeding means thereforcomprising a hollow extension rod secured to and movable with said tool,a cylinder within which said rod extends, the position of said cylinderbeing adjustable relative to said rod, a normally stationary pistoncontained in said cylinder adapted to telescope with said rod andprovided with an abutment engaging element, means between the exteriorof said member and said piston for connecting the interior of the latterto said cylinder at a point in front of said piston, means for supplyingpressure fluid through said hollow rod to said cylinder to effect movement of the latter relative to said piston, and controlling means forsaid fluid supply.

12. In a drilling apparatus, a drilling tool, and feeding means thereforcomprising an extension rod secured to and movable with said tool, acylinder adjustably arranged with respect to said rod, means forclamping said cylinder to said rod, a normally stationary pistoncontained in said cylinder and relative to which the latter is movable,and means for supplying pressure fluid to said cylinder to effectmovement of the latter relative to said piston.

13. In a drilling apparatus, a drilling tool, and feeding means thereforcomprising an extension member secured to and movable with said tool, amember manually adjustable longitudinally of said member and connectiblethereto, a normally stationary member extending within said adjustablememher and relative to which the latter is movable, and means foreffecting movement of said adjustable member relative to said stationarymember.

14. In a drilling apparatus, a drilling tool, and feeding means thereforcomprising a hollow extension rod carried by and movable with said tool,a cylinder manually adjustable longitudinally of said rod andconnectible thereto, a normally stationary piston contained in saidcylinder, and means for supplying pressure fluid to said cylinder toeffect movement of the latter relative to said piston.

15. In a drilling apparatus, a drilling tool, and feeding means thereforcomprising an extension member in the form of a hollow rod carried byand movable with said tool, a feed cylinder cooperating with said rod, anormally stationary feed piston contained in said cylinder and relativeto which said cylinder is movable, means to permit adjust ment of bothsaid cylinder and piston relative to said hollow rod, and means forsupplying pressure fluid to said cylinder to effect movement of thelatter relative to said piston.

16. In a drilling apparatus, a drilling tool, an extension membersecured to and movable with said tool, a cylinder cooperating with saidmember and movable longitudinally relative thereto, a normallystationary piston contained in said cylinder and relative to which saidcylinder and said member are movable, means for supplying pressure fluidto said cylinder to effect movement of the latter and said memberrelative to said piston, and means permitting independent-orsimultaneous movement of said cylinder and member.

17 In a drilling apparatus, a drilling tool, and feeding means thereforcomprising an extension member secured to and movable with said tool,afeed cylinder connectible to said member in different longitudinallyadjusted positions, a normally stationary feed piston contained in saidcylinder, and means for supplying pressure fluid to said cylinder toeffect relative movement between the latter and said piston.

18. In a drilling apparatus, a drilling tool, and feeding means thereforcomprising an extension rod secured to and movable with said tool, afeed cylinder within which said rod extends, means for securing saidcylinder to said rod in different longitudinally adjusted positions, anormally stationary feed piston contained in said cylinder and having anabutment engaging piston rod secured thereto, and means for supplyingpressure fluid to said cylinder to effect movement of the latterrelative to said piston.

19. In a drilling apparatus, a drilling tool,

and A feeding Y means therefor comprising an extensionrod secured to andmovable With said lIOOL El leed cylinder Within which said rod eXtends,means forsec-ur-ingsaid .eylinder to said rod in difl-erentlongitudinally adjusted ;positions, a normally stationary teedpiston contained in said cylinder and having an abntment'engaging pistonrod secured thereto, means'for sup-plying pres sure fluid to:saidcylinder-to eii'ectmovement of the latter relative to said aiston, andmeans for controlling the movement of saideylinder.

'20. ln a drilling apparatns a drilling tool,

15 and feeding means therefor comprising a normally stationary 1nember,=a;plurality of relatively movable elements eooperating simultaneousmovement of saidelements or of either independently of the otherre1ative to said stationarymember by fluid: pressure.

In testimony \vhereofI afiix my signature.

ELMER G. GAPTIN.

